Cascading analog record/playback devices
US5164915A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 22, 1991 |
| Grant date | Nov 17, 1992 |
| Priority date | — |
| Expiry date | Jan 22, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2207/16
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Cascading analog record/playback devices allowing the recording and the playback duration of individual devices to be extended by connecting together multiple devices of the same type. Each such device contains both writing and reading circuits as well as memory circuits. The memory is embedded inside the device and does not have direct access to the outside of the device. All control functions relating to the selection of particular devices is done by the devices themselves without external intervention or assistance. A single input circuit and a single output circuit is used by all devices. In the case of a voice record and playback system, all devices use a single microphone and single loudspeaker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.